Esata port multiplier explaination please

I am looking for some advice about an esata enclosure setup. I would like to move into a multiple drive array for FCP and would like to know how the port multiplier works.
I already have figured out that hardware RAID is superior to software RAID. My question is whether I can get an enclosure with the parts that handle the multiplying (I already have a newer technolgy extenders cable product), or whether I need both that and a card which handles the multiplying?
If someone could explain to me what I need, and hopefully how it works, it will be much appreciated.
Thanks.

Thanks for the response.
The extender cable plugs two cables directly to 2 unused sata ports directly on the logic board. http://www.newertech.com/products/esata_cable.php
I believe I have found out that it does NOT support port multiplier from within an enclosure - not exactly sure why. That came from a post on this forum http://discussions.apple.com/thread.jspa?messageID=10117571&#10117571
So then the question becomes, if I get a card like the Sonnet Tempo E2P (which does not have port multiplier) will I still benefit if I choose an enclosure which has an internal port multiplier? Or do I need both card AND enclosure - both with port multipliers???
Thanks so much.

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Hi iceman,
Did you get a response on this? I am looking at getting the MB561US-4S-1 Quad Bay eSATA & USB 2.0 External Enclosure http://www.icydock.com/goods.php?id=123 and need to know if the DV7 supports port multiplier capability as well.
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Is the eSATA port compatible with port multiplier products? If not, is there any hardware I can purchase to solve this?
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Q Only a single drive appears when using eSATA.
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http://www.thermaltakeusa.com/Product.aspx?C=1346&ID=1895
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Hi to all, I have an HP PAVILLON DV3550EL and I would like to buy an External SATA Port Multiplier in order to connect more than one hard disk to the eSATA port, but I don't know if the laptop is esata port multiplier compatible.
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which requires the esata to have port multiplier function.
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Hi,
the onboard eSATA port is hosted by a JMicron JMB362 Chipset, which (according to the JMicron product specifications) supports the following:
http://www.jmicron.com/Product_JMB362.htm
Quote
Port Multiplier with Command-based Switching
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hi phoelling,
you can get further informations on [http://www.intel.com], search for "inte matrix storage device driver".
as far as i know this chipset supports raid "0+1"
how about the readme which comes with this driver?
try this:
- opening storage manager
- klick (right) on the device
- choose create volume
if your external drive has a ready built raid
the OS wont see the seperate drives because the raidfunktion of your external drive shows only one drive to the OS...
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K9A2 Platinum esata port and Install and Usage of esata External Hard Drive

I just bought a sata hard drive and an icy dock enclosure for backup purposes. Having never used one before can someone explain how this works?
I have the hard drive in the enclosure, no problem there. I plugged it into the esata port on the back of my motherboard, but vista won't recognize it and when I reboot and go into the BIOS, I don't see it there either. I have purchased Acronis True Image 11 Home for backup and mirroring purposes. I wish to mirror my existing internal drive to this new external drive.
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3. Are the esata external drive considered plug and play or do I need to plug it in before I boot my computer.
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Everything seems to be working as I would have expected at this point, with the exception of the size of the mirrored drives.
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edit:
I did another test now after packing a .rar file. The transfer to the lacie failed, but to chieftech it went fine. But - sending huge .tiff files was the reason of buying esata disk, so that dosn't really help me, other than telling that sending 100 files will crash, and 1 file is less probable to fail, but has currently a 50/50 chance of doing so.
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1 file was zipped on the internal drive - 5,5 GB (2)
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Sorry, but I have no suggestions for solutions to your first post.
But, the W700 can run without RAID; you just need to turn it off. Backup all files before proceeding, during the boot process you can press CTRL + I to enter the RAID BIOS. Simply remove the drives from the RAID and install the OS to HDD 0 or 1. The other HDD will then be an "extra". After doing this you may also be able to hide RAID in BIOS, can't remember 100%, but should be do-able.
Hope this helps
Andy ______________________________________
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Not sure if i can get my answer here, but hoping someone will point me in the right direction.
Basically I am building my own Storage solution.
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FW800
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I have a K9A2 Platinum mobo. It has a Promise T3 controller for the ESata ports. I can find no documentation on this controller, so maybe the company who made them went out of business. I am looking for the information about this controller of whether it supports a "port multiplier function" since I am considering buying a MB561US-4S-1 Quad Bay eSATA & USB 2.0 External Enclosure from Icy Dock.

Quote from: Bas on 12-January-11, 05:42:36
Typical.
That is why I say, test it first.
Desktop boards often fail to boot from add-in RAID/SATA/SAS/SCSI cards.
And trust me, it more a rule that it fails.
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OWC is a reputable company that much I can say. While I know they warrant their work I am not sure how Apple would feel about it from a product warranty point of view. This is a question I think you should ask OWC and if the say Apple OK's it you should ask for that in writing.
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http://www.sharkoon.com/?q=en/node/1825
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According to this page, it appears to, although who knows if that information is correct.

Esata port multiplier explaination please

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